Darn it - I saw Xamina last year, summer time I think, following a couple of reviews here., but forgot to review.
Though she certainly is a hottie looks wise, I found her to be too passive, didn't take the lead on anything at all though happy with all suggestions with a smile and willingness.
As OP mentions, was great looking at her while grinding away however the passiveness in the end made it feel a bit weird.
Apologies for not reviewing.